Display bleeds while using the phone in dark mode and turn it off.

Hi sharak112,

We'd love to see if we can help out with the issue you're having, as we know how important it is that you're able to read your screen. First, we recommend updating to the latest version of iOS, if you have not already done so. If you're already up to date, we recommend the following steps.

1. "Restart your iPhone or iPad.
2. Make sure that your screen is clean and free of any debris or water.
3. Disconnect any Lightning or USB-C accessories. If your screen works after removing an accessory, try using a different outlet, cable, or charger.
4. Remove any cases or screen protectors.

Contact Apple Support

If your screen still isn't working, you might need to set up service for your device. Contact Apple Support."

Reference: If your screen isn't working - Apple Support

Cheers!